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10 bestL Lysine Supplement For Catsof December 2025

112M consumers helped this year.

1

Vetoquinol Viralys L-Lysine Supplement for Cats, 21oz/600g - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Palatable Fish & Poultry Flavored Lysine Powder

Vetoquinol Viralys L-Lysine Supplement for Cats, 21oz/600g - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Palatable Fish & Poultry Flavored Lysine Powder

Vetoquinol Viralys L-Lysine Supplement for Cats, 21oz/600g - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Palatable Fish & Poultry Flavored Lysine Powder

Vetoquinol

9.9

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2

Vetoquinol Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder

Vetoquinol Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder

Vetoquinol Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder

Vetoquinol

9.8

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5% off

3

Vetoquinol Enisyl-F Oral Paste for Cats, L-Lysine HCI Nutritional Supplement 100 ml

Vetoquinol Enisyl-F Oral Paste for Cats, L-Lysine HCI Nutritional Supplement 100 ml

Vetoquinol Enisyl-F Oral Paste for Cats, L-Lysine HCI Nutritional Supplement 100 ml

Vetoquinol

9.8

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4

PETPAL L-Lysine Immune and Respiratory Support Supplement for Cats | Pure Bioactive Lysine + | Eye Function, Runny Nose, Sneezing, Feline Conditions | Easy to Serve | Cats of All Ages | 4oz / 120g WT

PETPAL L-Lysine Immune and Respiratory Support Supplement for Cats | Pure Bioactive Lysine + | Eye Function, Runny Nose, Sneezing, Feline Conditions | Easy to Serve | Cats of All Ages | 4oz / 120g WT

PETPAL L-Lysine Immune and Respiratory Support Supplement for Cats | Pure Bioactive Lysine + | Eye Function, Runny Nose, Sneezing, Feline Conditions | Easy to Serve | Cats of All Ages | 4oz / 120g WT

Pet & Pal

9.6

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5% off

5

Vetoquinol 015VT5OZ Viralys Gel, 5 oz

Vetoquinol 015VT5OZ Viralys Gel, 5 oz

Vetoquinol 015VT5OZ Viralys Gel, 5 oz

Vetoquinol

9.4

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OtherRelated products

Pack of 3 x Pet Naturals of Vermont L-Lysine for Cats Chicken Liver - 60 Chewables

Pack of 3 x Pet Naturals of Vermont L-Lysine for Cats Chicken Liver - 60 Chewables

NOW - L-Lysine 500mg 250 Capsules

NOW - L-Lysine 500mg 250 Capsules

Tomyln Immune Support L-Lysine Supplement Chews for Cats, 30 ct

Tomyln Immune Support L-Lysine Supplement Chews for Cats, 30 ct

Tomlyn Immune Support L-Lysine Supplement Powder for Cats, 100g

Tomlyn Immune Support L-Lysine Supplement Powder for Cats, 100g

6

NOW Pet Cat L-Lysine Powder, 8-Ounce

NOW Pet Cat L-Lysine Powder, 8-Ounce

NOW Pet Cat L-Lysine Powder, 8-Ounce

NOW

9.3

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10% off

7

Webber Naturals L-Lysine 1000 mg, 60 Tablets, Prevents Cold Sores, Vegan

Webber Naturals L-Lysine 1000 mg, 60 Tablets, Prevents Cold Sores, Vegan

Webber Naturals L-Lysine 1000 mg, 60 Tablets, Prevents Cold Sores, Vegan

Webber Naturals

9.0

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8

Felisyl Immune System Support Granules - Support Healthy Tissues, Respiratory and Vision for Cats - 3.5 oz

Felisyl Immune System Support Granules - Support Healthy Tissues, Respiratory and Vision for Cats - 3.5 oz

Felisyl Immune System Support Granules - Support Healthy Tissues, Respiratory and Vision for Cats - 3.5 oz

Pet Health Solutions

8.8

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9

Vimergy L-Lysine – Promotes Healthy Skin, Hair, Nails & Joints* – Supports Healthy Metabolism* – Vegan, Non-GMO & Gluten-Free – 90 Capsules

Vimergy L-Lysine – Promotes Healthy Skin, Hair, Nails & Joints* – Supports Healthy Metabolism* – Vegan, Non-GMO & Gluten-Free – 90 Capsules

Vimergy L-Lysine – Promotes Healthy Skin, Hair, Nails & Joints* – Supports Healthy Metabolism* – Vegan, Non-GMO & Gluten-Free – 90 Capsules

VIMERGY

8.6

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11% off

10

Renew Actives Fast-Acting L-Lysine 1000mg with Zinc & Vitamin C – Maximum Strength Cold Sore Relief & Herpes Simplex Virus (HSV) – Promotes Healthy Collagen Production for Hair, Skin & Nails – Easy to Swallow, Vegan, Made in Canada.

Renew Actives Fast-Acting L-Lysine 1000mg with Zinc & Vitamin C – Maximum Strength Cold Sore Relief & Herpes Simplex Virus (HSV) – Promotes Healthy Collagen Production for Hair, Skin & Nails – Easy to Swallow, Vegan, Made in Canada.

Renew Actives Fast-Acting L-Lysine 1000mg with Zinc & Vitamin C – Maximum Strength Cold Sore Relief & Herpes Simplex Virus (HSV) – Promotes Healthy Collagen Production for Hair, Skin & Nails – Easy to Swallow, Vegan, Made in Canada.

Renew Actives

8.3

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